Nine 1,4-diazabutadiene compounds, Ar-N=C(R)-C(R)=N-Ar, R=H. Me; Ar=H2n+1CnO-C6H4, 2,4-(H9C4O)(Me)-C6H3, were synthesized and their liquid crystal properties were studied through thermal polarizing microscopy. The X-ray single crystal structure of compound 9 (Ar-N=C(H)-C(H)=N-Ar, Ar=2,4-(Me)(H9C4O)C6H3) was tested. It is a monoclinic crystal system, space group P2(1)/C with the unit cell parameters: a=7.0703(3)Angstrom, b=8.6741(4)Angstrom, c=18.3115(8)Angstrom, beta =95.392(1)degrees. V=1114.57(9)Angstrom (3), z=2, Dc=1.134 Mg/m(3), R=0.0490, Rw=0.1237.